Unlike the automobile company, whose research was based on crashes involving sport utility vehicles, the research conducted by the insurance company took into account such factors as a driver’s age, sex, and previous driving record.
company, whose research was based on
company, which researched
company, in its research of
company’s research, having been based on
company’s research on
D选项:’having been based on ‘ is wordy.这个结构会使'having been based on crashes involving sport utility vehicles'更倾向于修饰'the research conducted by the insurance company.而不是the automobile company'
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